Adjustable brake-head.



C. P. MURRAY. ADJUSTABLE BRAKE HEAD. aprmouron IILBD rum, 1911.

Patented Oct. 17,1911.

UNITED STATES PATEN T OFFICE.

CHARLES F. MURRAY. OF EVANSTON, ILLINOIS, ASSIGNOR TO SIMPLEX RAILWAY APPLIANCE COMPANY, OF CHICAGO. ILLINOIS, A CORPORATION OF ILLINOIS.

ADJUSTABLE BRAKE-HEAD.

Specification of Letters Patent.

Patented Oct. 17, 1911.

Application filed February 8, 1911. Serial No. 607.349.

To all whom it may concern.

Be. it known that I, (fJHARLns F. MURRAY, a citizen of the United States, residing at Evanston, in the county of (ook and State of Illinois, have invented certain new and useful Inqn'ovoments in Adjustable Brake- Heads, of which the following is a specification.

My inventitm relates to adjustable brake heads. and has particular referenee to a. brake head of this eharaeter whieh shall have provision for ellieient looking means and which shall be sin'iple in ronsl'ruetion.

I am aware that forms of bralce heads have been devised wherein an upward thrust of it looking: block is relied upon to lmh-l tho lvra kehead in adjusted position. ll mvever, this result has usually been :u-- eoinplished by means of springs and ithl out positive looking eil'eet. I

'lherefore. one of the objects of my in-, veution is provision of an adjustable brake i head 'lliell shall avoid the use of springs. I

As will be understood, the limits. as estahlished by the Master (ar Builders as l l l l l i to wheel base, preeludes the tll!|)ll) \'lll(lli of adjustable brake heads \\'lll(ll shall pg ogeet horizontally from the head. thereto! the adjusting means must be at the top ogbot tom of the head and as the brake hanger prevents the loration of the :uljustiup means at the top, the spare \vhieh remains is at the liottotn only.

One of the objects of my invention, therefore, is to provide a positive looking means \vhieh shall oeeupy but small spare and \vhi h shall further be so eonstrueted that. if the lot-king nut he lost or the locking bolt; broken that the head eanniit :u'eidentally be removed from the sleeve.

My invention will be more readily understood by relerenee to the aeeompanying drawings wherein-,- I

Figure l is a side elevation. partly in seetiou, showing a brake head as eonleniplated althoug1 this is notby my invention: Fig. 2 is a eenlrul ver-- tieal seetiou thereof: Fig. l is an enlarged perspeetive of. the looking bloelc of my invention; Fig. l is a view of the combined span and lerrule-einplo ved in eonneetion with niv loel in, means and Fig. 5 is a modified form. of span.

litfll'l'lllg'llltll't' |mrlleularly to the drawn'ession and tension members of the brake lieam, not shown, are adapted to be accommodated within the concentric opening in the sleeve 10, these members being secured in the sleeve in any well known manner. The sleeve 10 is provided with the continuous peripheral groove 11 having corrugations at the inner end thereof, the form of this peripheral groove providing the annu- .lal' flange 12 which is continuous except at A brake head 14 is rotatably mounted on the sleeve 10 and is provided with a housing 1:: closed at its lower end exrept for the opening 16 for the PUI'DOSB hereinafter described. The upper on of the housing is open to the interior of the brake head. str'ut 17, preferably inteand with the housing. is provided with an opening 18 within which is seated'a bolt [9. A nut J0 and a nut look 20 provide means for setting and locking the bolt as desired. Kim-king block 21, shoun' in Fig. 3. is eurved on its upper surface to correspond to the radius of the lower. portion of the point 13.

the groove 11 and this upper surface is preferably corrugated or roughened as shown at The locking block has a pair of downwardly extending legs 23, these legs being adapted to straddle the strut 17. A span LZ-l havino' a bolt opening 25 therein is adapted to war against the lower ends of the legs 23 and a ferrule 26 provides the bearing ronneetion between the nut 20 and the span 24.

.-\s shown in Fig. 5 I may prefer to con struet s )an 2-! and ferrule 26 in one piece preferable as some dif lieulty may he experieneed in seating the span and ferrule-in their proper location if they are east in one piece.

ln assemblin my improved brake head the span :24 is lirst placed within the housing underneath the strut 17, the bolt 1!) is next seated in the strut, the loek'in block is next placed within the housing tin-(nigh the. interior of the opening through the brake lie-ad. \Vhen this is done the locking bloek will rest on the head of the bolt 19 and a portion of the block will extend within the radius of the opening through the brake head. The head is then given a hall turn from the position shown in the drain" hugs. and in this position the projecting,

lugs. it will be understood that the eonii portion of the looking block will register with the openin 13 of the annular flange 12. The brake fiend may be then slipped on to the sleeve and returned to its upright position. It will be seen that the head osmnot possibly be removed until it is turned to the point where the locking block registers with the opening 13 of the flange. i'he ferrule 26 is then added to the bolt and then the nut 20. It will be seen that by advancing the nut 20 on its threads the force exerted thereby will be transmitted to the ferrule, the span, and the downwardly projecting legs of the locking block 21, thence to the sleeve. If the nut 20 should beeon'ie loose and be lost the locking block may descend for a short distance and. its locking action, of course, will cease but the head cannot be removed from the sleeve until it is given a half turn.

It will be understood that various modifications may be made in this structure all of which come within the scope of the claims herein.

I claim:

1. An adjustable brake head comprising, in combination, a sleeve having a groove and a discontinuous flange, a locking block mounted within a housing in said head, a strut within said housing, and means for transmitting a thrust from said strut to said locking block, substantially as described.

2. An adjustable brake head comprising, in combination, a sleeve having a groove and a discontinuous annular flange, a positii'ely actuated locking block mounted within a housing in said lead, a strut within said housing, a span cooperating with said locking block, and a bolt adapted to transmit a thrust from said'strut to said locking block, substantially as described.

CHARLES F. MURRAY.

lVitnesses:

S. S. Co'rrna, M. Ronma'rson. 

